Was waiting for the CTS Turbro sale for the resonator delete and decided on an impulse buy. Found out that the Audi S3 pipe is a little cheaper than O34 (In Canada at least, from local buyers) - about $100 more than CTS - but hey I got the guys at Calgary Autoworks to install it right there on the spot so yeah, I'm an impulse buyer.
Here's some thoughts:
CTS looks decent enough, I have their turbo inlet pipe and happy with it but didn't want to wait. Some say the quality isn't great but come on, how often are you going to actually look at it.
To that point the 034 is a beautiful piece of work, nice welds, stainless, clean, etc. The Audi/VW S3/GTI/R piece, well it looks like the stock exhaust steel, welds, etc. and because I may some day do a catback, it wasn't really worth it to put a "nice looking" res delete pipe in between crappy metal stock piping if I may replace it later anyway. To me, this looks more "factory" so I went with the middle ground.
Sound wise, well this is subjective as most of you know so I'll offer my subjective opinion and since there are loads of threads on this topic I didn't do any sound compare video's etc.
First, I like it. I think its subtle and just what the engine needed. I can actually hear it over the soundaktor now and its a good combo. Does it drone, well....barely. I actually thought the R droned a bit anyway, just a touch, so this adds a bit more but not the kind of drone that you get from a full catback with a really crappy resonator. In a DSG you have 7 gears so find one that doesn't drone. At 140kph we're in 2500rpm and it doesn't drone so don't tell me you can't find a gear that doesn't drone. In the city you might be cruising along in 3rd or 4th and get a little drone, but this is not in any way a mind numbing drone, its ok. And rowing through the gears makes it all worth it.
If you're cheap, try the CTS or whoever has the best sale, this is a simple mod and completely reversible. I think it was well worth it.